1. A block of mass m1= 0.50kg placed in top of another block of mass m2= 0.80 kg, which rests on a frictionless surface. A horizontal force of 2.0N is applied to the lower block .
(a) Find the acceleration of the system of two blocks
(b) Find the force of static friction between the two blocks if there is no relative motion between their contact surfaces. Notice that the force of static friction need not take its maximum possible value of ?Ns